| Sensor | . |
|---|---|
| Temperature Measurement Range | -40°C to 75°C |
| Temperature Accuracy | ±0.25°C from -40° to 0°C |
| Temperature Resolution | 0.02°C |
| Temperature Drift | <0.01°C per year |
| Temperature Response Time (typical, to 90% of change) | 3 minutes, 45 seconds in air moving 1 m/s |
| RH Measurement Range | 0–100% RH at -40° to 75°C; exposure to conditions below -20°C or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1% |
| RH Accuracy | ±2.5% from 10% to 90% RH typical to a maximum of ±3.5% including hysteresis at 25°C; below 10% and above 90% ±5% typical |
| RH Resolution | 0.01% RH |
| RH Drift | <1% per year typical |
| RH Response Time (typical, to 90% of change) | 15 seconds in air moving 1 m/s |
| Wireless Mote | . |
| Operating Temperature Range | -40 to 70°C |
| Radio Power | 12.6 mW (+11 dBm) non-adjustable |
| Transmission Range | Reliable connection to 457.2 m (1,500 ft) line of sight at 1.8 m (6 ft) high |
| Wireless Data Standard | IEEE 802.15.4 |
| Radio Operating Frequencies | 921 Mhz |
| Modulation Employed | OQPSK (Offset Quadrature Phase Shift Keying) |
| Data Rate | Up to 250 kbps, non-adjustable |
| Duty Cycle | <1% |
| Maximum Number of Motes | 50 motes per one HOBOnet wireless sensor network |
| Battery Type | Two AA 1.2 V rechargeable NiMH batteries powered by built-in solar panel or two AA 1.5 V lithium batteries for operating conditions of -40 to 70°C |
| Battery Life | With NiMH batteries: Typical 3–5 years when operated in the temperature range -20° to 40°C and positioned toward the sun (see Deployment and Mounting), operation outside this range will reduce the battery service life |
| Memory | 16 MB |
| Dimensions | Sensor: 45.97 x 11.43 x 10.16 mm |
| Weight | 223 g |
| Materials | Sensor: Polyamide |
| Environmental Rating | IP67, NEMA 6 |
HOBOnet Wireless Temp/RH Sensor
The HOBOnet Wireless Temperature and Relative Humidity Sensor provides a cost-effective and scalable solution for web-enabled monitoring of air temperature and humidity. HOBOnet Wireless Sensors communicate data directly to the RX Station or pass data through other wireless sensors back to the central station.
Description
The HOBOnet Wireless Temperature and Relative Humidity Sensor provides a cost-effective and scalable solution for web-enabled monitoring of air temperature and humidity. HOBOnet Wireless Sensors communicate data directly to the RX Station or pass data through other wireless sensors back to the central station. They are preconfigured and ready to deploy, and data is accessed through HOBOlink, Onset’s innovative cloud-based software platform.
Highlighted Features
- High accuracy: ± 0.2°C (± 0.36°F) and ± 2.5% RH
- Robust RH sensor withstands extended use in high-humidity environments
- 900 MHz wireless mesh self-healing technology
- 450 to 600 meter (1,500 to 2,000 feet) wireless range and up to five hops
- Up to 50 wireless sensors per RX Station
- Simple button-push to join the HOBOnet wireless network
- Onboard memory to ensure no data loss
- Powered by 2 user-replaceable lithium AA batteries
In what environment does this sensor operate?
This sensor operates in an indoor environment.
What measurements does this sensor support?
The RXW-THC-B-921 sensor supports the following measurements: Dew Point, Relative Humidity and Temperature
Important Info:
A complete system requires at least one HOBO RX Remote Monitoring Station, a HOBOnet Wireless Manager (RXMOD-RXW-921), and a HOBOnet Wireless Sensor. HOBOnet Wireless Repeaters (RX-RPTR-921) can be added to extend the range.
